One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,8)(17,18,24,29)(19,22,31,25)(20,27,21,26)(23,28,30,32)(1,3,6,8)(2,7,4,5)(10,13)(14,16)(17,19)(18,25)(20,30)(21,23)(22,29)(24,31)(26,32)(27,28)(2,4)(3,8)(9,10,12,13)(11,14,15,16)(17,20,24,21)(18,26,29,27)(19,30,31,23)(22,28,25,32)(3,8)(5,7)(11,15)(14,16)(17,21,24,20)(18,27,29,26)(19,30,31,23)(22,28,25,32)(1,4,6,2)(3,7,8,5)(9,10)(11,14)(12,13)(15,16)(17,22)(18,19)(20,32)(21,28)(23,26)(24,25)(27,30)(29,31)(1,5,6,7)(2,8,4,3)(9,11)(10,14)(12,15)(13,16)(17,23,24,30)(18,28,29,32)(19,21,31,20)(22,26,25,27)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.